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, DOOR LOOK AND LATCH. No. 256,665. Patented'Apr. 18,1882.

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DOOR LOOK AND LATGH.

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Patented Apr. 18, 1882.

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' UNITED STATES 7 PATENT OFFICE.

OLE FLAGSTAD, or HAMAR, NonWA-Y.

DOOR LOCK AND LATCLH.

SPECIFICATION forming part of Letters Patent No. 256,665, dated April 18, 1882.

Application filed October 22, 1881. (Modeh) To all whom it may concern Be it known that I, OLE FLAGSTAD, of Hamar, Kingdom of Norway, have invented certain new and useful Improvements in Door- Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the aceompanyingdrawings, which form part of this specification.

My invention relates to an improvement in door-locks; and it consists in certain details in construction and combinations of parts, as will be more fully described, and pointed out in the claims.

In the accompanying drawings, Figure l is a perspective view of the lock secured in po= sition. Fig. 2 is a plan view with the front Fig. 3 is a longitudinal sectional view through the operating-handles.

Fig. 4 is an end view of one of the handles.

Fig. 5 is a plan view of the lock with the bolt fiemoved, and Fig. 6 is a side elevation of the A represents the lock-casing, and B the face-plate by which itis secured in the door, the latter being provided with openings for the passage of the bolt and spring-actuated latch. This spring-actuated latch O is provided with a rearwardlyextending arm, I), whichlatter is also provided with the laterallyprojecting lip E, having an oblong opening, F,

therein, in which the oblong projection G, secured to the easin g A, rest-s. This projection G serves to hold the latch in proper position and prevent it from becoming displaced. The rearwardly-extendin g arm D is also provided with a lug, H, havinga slot, a, formed therein, through which the rod I, having the spring J thereon, passes. This spring J bears on the inner face of the lug H, and constantly exerts an outward pressure thereon, which keeps the latch to its farthestlimit until the pressure of the spring has been overcome by turningthe handles K, which latter are connected thereto through the intervention of the barrel L, mm L, and connecting-link L This link L is provided at one end with an oblong slot, 1), or opening adapted for the reception of the lug c on'the arm L, while the opening I), at the opposite end of the link, adapts it to be secured to the latch C. By providing the inner end of the link L with an oblong slot the latch is enabled to move backward and 'forward while closing the door without communicating the motion to the handles. I

The barrel L is held in position between the sides of easing of the lock by the split collar M, which latter is rigidly secured to one face of the casing, with its ends d d separated sufficiently to allow the arm L enough movement to draw the catch in-until its outer edge is flush with the face-plate, while the edge d of the collar forms an abutting-surface for the arm L and prevents the spring N from moving thesaid latch too faroutward. This spring. N is composed of two U-shaped wires, having curvedends,asshown. OneoftheseU-shaped wires is connected to the finger e on the arm L, with its curved ends toward the face-plate B, while the other wire is hooked over the tinger e, secured to the face-plate B, with its curved ends toward the arm. A spiral spring is placed around the two wires f and f, and the ends or" the said spring abut against the curved. ends of -the U-shaped wires ff and are held securely in position. When the arm L;.is moved upward the wircf,.eonnected thereto, is partly withdrawn from betweenthe parallel sides of the other wire, f which compresses the spring, and consequently increases thepres'sure, which is sufficient to bring the handles up to their proper position.

The barrel L is adapted to rest flush with the outer surface of the front and rear plates of the casing A, and is provided centrally with retention of the screws g, which hold the handles Kin position. These handlesK are shaped as shown in the drawings, and each consists of abody, h,and shank h, the latter being covered or ornamented, as desired. The body portion It extends at right angles to the shank, and is ISO bored throughout its entire length for the end of the spindle 0, while the extreme inner end of each body is provided with two or more projecting lugs, -i, adapted to enter corresponding depressions in the ends of the barrel L. When the handles are secured in place the CX- tremc inner ends thereof are in immediate engagement with the barrel and act directly thereon, while the spindle merely serves to retain the handles in engagement with the barrel L. The belt P is situated below the split collar M, and is guarded by one tumbler, P, which latter is pivoted by the arm j to the stud k. This armj is pressed downward continuously by the spring I, secured to the stud l, which latter also forms the pivotal bearing of the dog Q, which dogs the tumbler and pre- Vents it from releasing the bolt until it has first been moved outward.

The bolt is provided with the two vertical slots m, connected ccntrall y by the transverse slot at, and in these slots the stud n, on the tumbler P, is adapted to move. The length of the vertical slots m below the lowest edge of thetransverse slot on isjust the same distance the tumbler is moved upward by the key, which brings the stud a on the tumbler P in line with the transverse slot m and allows the bolt to be shot back in the lock by the action of the key on the bolt. If in trying to pick the lock the tumbler 1? should be moved slightly more than necessary, the stud enters the portion of the vertical slot above the transverse slot and prevents the bolt from being withdrawn.

The movement of the dog Q is controlled by the follower It and spring S, which latter is secured to the post 0, which affords pivotal bearing to the said follower. This outer end of this follower R is curved slightly upward, andis adapted to bear against a shoulder formed by cutting away the shank of the bolt. The spring S bears against the outwardly projecting end of the dog, and its tendency is to constantly force the outer or free end of the dog toward the free endof the tumbler. hen the bolt is shot inside the casing the follower R abuts against the projecting end 1" of the dog Q and moves the opposite end thereof away from the tumbler; but when the bolt is shot outward the pressure of the follower is released from the dog, which allows the spring S to force the dog toward the tumbler. The tumbler I? is T-shaped, and one end of the same is adapted to enter the slot s in the opposing face of the dog Q, where it is held until the dog has been moved outward by turning the key.

When the parts are constructed as above described the movement of the dog during the operation of withdrawing the bolt is controlled and effected by the follower, while the following movement of the follower during the shooting of the bolt is effected by the rear end of the spring-pressed dog bearin g against the follower. The key X, for operating this bolt,

is shown in Fig. 6. This key isprovided with a web, 1, having two curved slots, t, therein near the pin 11, so as to adapt it to fit over the annular collars T, formed around the eye of the key-hole on the inside of the front and rear plates, thereby allowing the web to move in contact with either plate of the look, so as to engage with the dog Q and tumbler P. The web of the keyis also provided with the notched ends 22, adapted to engage the dog and tumbler, while the extremity of the web is adapted to engage with either side of the notch U of the bolt P and move the bolt either in or out, as the case may be.

A key constructed as above described is adapted to be introduced from either side of the door and lock or unlock the doors desired. The movement of the bolt, together with its connective parts, is as follows: Supposing the bolt 1 to be housed and the key introduced into the key-hole, when the key is partly turned from right to left the tumbler I is first encountered by the wcb of the key at one of its cut-away ends, (depending on whether the key is introduced from the in or out side of the door which end is encountered,) which is moved upward until the projecting lug the'reon is in line with the transverse slot m. At thisjuucture the outer extremity, w, of the web 13 meets the side of the slot in the bolt on the dog side and moves the bolt outward. As the bolt is moving outward the web of the key leaves the tumbler, thereby allowing the spring 8 to exert its full pressure thereon, and as soon as the vertical slot at is reached the tumbler O is forced downward, and the stud a, enterin g the said vertical slot, locks the bolt. While this bolt has been moving outward the follower R has also been moving outward, thereby allowing the dog to move toward the tumbler, which it locks after the lug of the tumbler has entered the vertical slot m in the bolt.

When it is desired to unlock the door the dog has to be first moved outward by the key, which unlocks the tumbler and allows the key to move it. When the door is in an unlocked condition the dog is held out of engagement with the tumbler by the follower.

This improved lock,when applied to a door, presents a neat and finished appearance, and can, if desired, be adapted for indoor and outdoor as well as for mortise looks, as shown in the drawings. When the mortise-lock is used it can be applied to any ordinary thickness of door by simply adjusting the collars W on the head of the handle by means of the screw Y, The said collars W are adjusted and secured after the handles areplaced in position. Again, the parts of my improved lock are not liable to become displaced or broken, and in case either spring J or N should by any accident become useless, the remaining spring is ofsuflicient strength and will perform the necessary functions of holding the spring-latch in operative position.

If so desired, the spindle O can be provided with angular ends and the handles K with angular bores corresponding thereto, and the immediate connection between -the handles and barrel L be dispensed with, so that instead of the spindle performing the mere function of holding the handles in position, it forms the connecting medium between the handles and barrel.

My improvement is susceptible of many slight changes in construction, and hence I would have it understood that I do not limit myself to the exactconstruction of parts shown and described, but consider myself at liberty to make such changes as come within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, isa 1. The combination, with the spring-actuated latch and barrel having a projecting arm rigidly secured thereto, of a connecting-link pivotally secured to the-spring-actuated catch atone end, and provided at its opposite end with an'oblong slot, by which it is connected to the arm of the barrel, anda spring constructed substan tiall y as described and adapted to connect the arm of the barrel. to the faceplate of the lock, substantially as set forth.

split or opening, the opposing ends of the said collar forming the limit of movement of the said barrel and arm, substantially as set forth.

3. The combination, with the working-barrel provided with notched faces, of handles having projections formed on the ends thereof and adapted to engage with the projections, a spindle connecting the handles to the barrel, the split collar for holding the barrel in position, and means for connecting the barrel to the spring-actuated catch.

4. The combination, with the handles K, spindle O, collars W, barrel L, and split collar M, of the spring N, connecting-link L catch 0, guide-rod I, spring J, and lug H, all constructed and arranged substantially as shown.

5. The combination, with the bolt provided with the two vertical and one transverse slots and the spring-actuated tumbler, constructed as described, and provided with a projecting end adapted to movein the above-named slots, of a spring-actuated dog, provided with an opening in one side for the reception of one end of the tumbler where the bolt is shot outward, and a follower adapted to hold the dog away from the tumbler when the boltis housed, substantially as set forth.

In testimony that'I claim the foregoing I have hereunto set my hand this 22d day of July, 1881.

OLE FLAGSTAD.

Witnesses:

FEUR RoHNE,

H. FRANG. 

